Grinding-machine



(No Model.) 2 Sheets-Sheet 1.

J. B. DEEDS 8: W. MACK.

GRINDING MACHINE.

Patented May 16. 1893.

12v rim I026" ff. 3 wow-WW WITNESSES .zlltormg 1 was 5 951cm co,PNoYu-UT (No Model.) 2 Sheets--Sheet 2.

J. B. DEBDS,&IW. MACK.

' GRINDING MACHINE.

No. 497,567. Patented-May 16, 1 893.

mam 1mm WIZWESSES UNTTED STATES PATENT OFFICE.

JOHN B. DEEDS AND WILLIAM MACK, OF TERRE HAUTE, INDIANA.

GRINDING- MACHINE.

SPECIFICATION forming part of Letters Patent NO. 497,567, dated May 16,1893.

Applicationfiled November 10, 1892. Serial No. 451,527- (No model.)

. of the invention, such as will enable others skilled in the art towhich it appertains to make and use the same.

This machine relates to machines for grin ding reaper knives, plowpoints, saw teeth and other similar cutting tools; and it consists inthe novel construction and combination of the parts hereinafter fullydescribed and claimed.

In the drawings: Figure 1 is a side View of the machine. Fig. 2 is afront View of the arm which carries the grindingrwheel. Fig. 3 is asection taken on the line at a; in Fig. 2. Fig. 4 is a plan view, fromabove, of the feeding devices.

A is the base plate of the machine.

B is a bracket secured to the base plate and provided with the twobearings 11 b.

O is the toothed driving wheel provided with a handle a. The hub a ofthe driving wheel runs loose upon the outer end of the shafzt 0, betweenthe collar 0' and the bearing B is an arm which carries the grindingwheel. This arm is provided with a half bearing d at its upper end, andd is a clip provided with a similar half bearingand se-.

cured to the arm by the bolts D. The arm is clamped tightly to the shaftObetween the bearings b b. The lower end of the arm D is forked and isprovided with bearings e for the shaft E of the grinding wheel to runin. The grinding Wheel E is secured on the shaft E between the bearingse, and e is a toothed pinion secured on one end of the shaft E andgearing into the wheel C. The other end of the shaft E is providedwithanut f and washers f so that another grinding wheel can be attachedto it when required, for use when the wheel E cannot conveniently beused in g is screwed through a hole in the crossbar,

and the arm D rests against the front end of the rod when the grindingWheel is in its lowest desired position.

H are guides secured to the base plate.

H is a slide which moves back and forth in the guides H. The slide H isprovided with clamping devices h of approved cons ruction for securingthe work to it.

I is a horizontal hand-lever pivoted on the pin 11 projecting from thebase plate, and J are links pivotally connecting the lever Iwiththe-rear end of the slide H.

The work is moved back and forth under the revolving grinding wheel bymeans of the hand-lever until the arm D touches the stop rod g. When thework is pushed under the grinding wheel, it raises the grinding wheelslightly, and the shaft 0 is turned in the bearings b b, but this motionof the shaft does not interfere with the grinding because the drivingwheel 0 runs loose upon the end of the said shaft. Clamping the arm D tothe shaft and carrying the shaft ends in bearings makes the grindingwheel run very true, and as the motion of the shaft in the bearings isvery slight, the bearings do not become worn and allow the grindingwheel to have side play.

What we claim is 1. In a grinding machine, the combination, with asupporting bracket provided with a crossbar and with bearings b I), ofthe shaft 0 pivoted in the said bearings, the arm secured on the saidshaft, the grinding-wheel shaft journaled in the free end of the saidarm, the toothed pinion secured on the grinding-wheel shaft, the tootheddriving-wheel journaled on the shaft 0' and gearing into the saidpinion, and an adjustable stop-rod screwed into the said crossbar andoperating to limit the downward motion of the said arm, substantially asset forth.

2. In a grinding machine, the combination, with the supporting bracketprovided with a crossbar, of the arm, for carrying the grinding wheel,pivoted to the top of the said bracket, and the adj ustablo stop-rod forliiniting the to motion of the said arm, said rod being provided withthe thumb-piece for revolving it and being screwed through a hole in thesaid crossbar, substantially as set forth.

In testimony whereof We afiix our signatures in presence of twowitnesses.

JOHN B. DEEDS. WILLIAM MACK.

Vitnesses:

EMMA A. SMITH, D. W. HENRY.

